<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<script>
		function a () {
			this.name = 'xiao';
		}
		a.prototype.say = function(){
			alert(this.name)
		};
		var b = new a;

		/*alert(Function.prototype.isPrototypeOf(a)) // ture
		alert(Object.prototype.isPrototypeOf(a)) // ture
		alert(Object.prototype.isPrototypeOf(Function)) // ture
		alert(Function.prototype.isPrototypeOf(Object)) // ture

		alert(Object.getPrototypeOf(Object.prototype))// null*/

		alert(Object.prototype === Object.getPrototypeOf(Function)) // false
		alert(Object.prototype === Object.getPrototypeOf(Function.prototype)) // true
	</script>
</body>
</html>